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- Title
3 年生赤皮青冈家系生长和 形质性状变异与选择.
- Authors
杨孟晴; 邵慰忠; 徐永宏; 姚甲宝; 欧阳天林; 代丽华; 周志春; 王 斌
- Abstract
[Objective] To reveal the genetic variation rule of the growth and form-quality traits of the 3-yearold elite families of Cyclobalanopsis gilva in different locations, and select the fast-growing and high-quality families with genetic stability for different regions and sites. [Methods] Based on the genetic assay forest constructed in Jiande of Zhejiang Province, Fenyi and Anyuan of Jiangxi Province with 1-year-old container seedlings of 42 elite families plantations of C. gilva in 2019, a whole forest survey was conducted and the differences of traits, heritability and genetic correlation, as well as the interactions between families and locations were analyzed using SAS software, and a batch of fast-growing and high-quality families were selected based on principal component analysis and BLUP methods. [Results] The average tree height and ground diameter of 3-year-old C. gilva were 2.04 m and 3.15 cm, respectively. The estimated family heritability of tree height, ground diameter, crown width and longest branch length were high (0.393-0.753). Compared with family heritability, individual heritability estimates was relatively low. The correlation between traits of different families was high, and the families with excellent tree height and ground diameter performance had straighter form, fewer branching trunks but more branches, longer and thicker branches than the families with low tree height and small ground diameter. The interaction effect of family × site was obvious, and the site had a great influence on the growth. The best growth performance was found in Jiande site, followed by Anyuan and Fen Yi. Based on the comprehensive ranking of growth and form-quality traits, HNCB8 and HNHT5 ranked first in the three test sites, showing a good overall performance. The top 20% BLUP values of tree height and ground diameter were selected, and a total of 10 excellent families were selected from the three test sites. HNCB8 was selected as a common family. [Conclusion] There are rich genetic differences in growth and form-quality traits among the 3-year-old C. gilva, and the family heritability is generally high, which is subject to strong genetic control. The change of planting habitat has a great influence on the family of C. gilva, and the comprehensive performance of HNCB8 and HNHT5 is better, which has the potential for promotion.
- Subjects
JIANGXI Sheng (China); ZHEJIANG Sheng (China); TREE height; ELITE (Social sciences); GENEALOGY; FOREST surveys; PRINCIPAL components analysis; GENETIC software
- Publication
Forest Research, 2023, Vol 36, Issue 4, p31
- ISSN
1001-1498
- Publication type
Article
- DOI
10.12403/j.1001-1498.20220563